#include <stdio.h>
int main()
{
    struct Date
    {
        int month;
        int day;
        int year;
    };
    struct Date birth = {.month = 10, .year = 1949};
    printf("My birth date is %d/%d/%d\n",
           birth.month, birth.day, birth.year % 100);

    birth = (struct Date){.month = 10, .year = 2021};
    printf("My birth date is %d/%d/%d\n",
           birth.month, birth.day, birth.year % 100);
    return 0;
}